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离散型罗戈夫斯基线圈测量误差的影响因素研究

Research on the Factors Influencing the Measurement Errors of the Discrete Rogowski Coil.

作者信息

Xu Mengyuan, Yan Jing, Geng Yingsan, Zhang Kun, Sun Chao

出版信息

Sensors (Basel). 2018 Mar 13;18(3):847. doi: 10.3390/s18030847.

DOI:10.3390/s18030847
PMID:29534006
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5877368/
Abstract

An innovative array of magnetic coils (the discrete Rogowski coil-RC) with the advantages of flexible structure, miniaturization and mass producibility is investigated. First, the mutual inductance between the discrete RC and circular and rectangular conductors are calculated using the magnetic vector potential (MVP) method. The results are found to be consistent with those calculated using the finite element method, but the MVP method is simpler and more practical. Then, the influence of conductor section parameters, inclination, and eccentricity on the accuracy of the discrete RC is calculated to provide a reference. Studying the influence of an external current on the discrete RC's interference error reveals optimal values for length, winding density, and position arrangement of the solenoids. It has also found that eccentricity and interference errors decreasing with increasing number of solenoids. Finally, a discrete RC prototype is devised and manufactured. The experimental results show consistent output characteristics, with the calculated sensitivity and mutual inductance of the discrete RC being very close to the experimental results. The influence of an external conductor on the measurement of the discrete RC is analyzed experimentally, and the results show that interference from an external current decreases with increasing distance between the external and measured conductors.

摘要

研究了一种具有结构灵活、小型化和可批量生产等优点的创新型磁线圈阵列（离散型罗戈夫斯基线圈-RC）。首先，使用磁矢势（MVP）方法计算离散型RC与圆形和矩形导体之间的互感。结果发现与使用有限元方法计算的结果一致，但MVP方法更简单、更实用。然后，计算导体截面参数、倾斜度和偏心度对离散型RC精度的影响，以提供参考。研究外部电流对离散型RC干扰误差的影响，得出螺线管长度、绕组密度和位置排列的最佳值。还发现偏心度和干扰误差随着螺线管数量的增加而减小。最后，设计并制造了一个离散型RC原型。实验结果显示出一致的输出特性，离散型RC计算出的灵敏度和互感与实验结果非常接近。通过实验分析了外部导体对离散型RC测量的影响，结果表明外部电流的干扰随着外部导体与被测导体之间距离的增加而减小。

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